chore: Java 스타일 수정

Author: github-actions

backend/src/main/java/io/f1/backend/domain/game/app/GameService.java

@@ -15,7 +15,6 @@
 import io.f1.backend.domain.game.dto.MessageType;
 import io.f1.backend.domain.game.dto.RoomEventType;
 import io.f1.backend.domain.game.dto.request.GameSettingChanger;
-import io.f1.backend.domain.game.dto.response.PlayerListResponse;
 import io.f1.backend.domain.game.event.GameCorrectAnswerEvent;
 import io.f1.backend.domain.game.event.GameTimeoutEvent;
 import io.f1.backend.domain.game.event.RoomUpdatedEvent;
@@ -209,7 +208,8 @@ public void handlePlayerReady(Long roomId, String sessionId) {
 
         String destination = getDestination(roomId);
 
-        messageSender.sendBroadcast(destination, MessageType.PLAYER_LIST, toPlayerListResponse(room));
+        messageSender.sendBroadcast(
+                destination, MessageType.PLAYER_LIST, toPlayerListResponse(room));
     }
 
     public void changeGameSetting(